This is why I was so taken aback. I recall DocGKR specifically saying it would meet standards in both duty-sized and compact/sub-compacts. I also remember "ShootingTheBull410" on Youtube showing excellent performance out of a short barrel (3" IIRC) in his testing that was conducted with BB-calibrated gel and heavy clothing. The only caveat I can think of is that HST has reportedly been tweaked a bit in the years since that testing.
I know that @Chuck Haggard is not the type of person to make such a remark flippantly, so I'm hoping he can elaborate if he sees this tag.